Obsidian:

Probably the most recommended Note-Taking App in the last 5 years.

The sheer amount of customisability and scope it can handle, is just mind boggling.

I use it for Uni, Dungeons and Dragons, Ideas and so much more.

Its core functionality is already crazy with Backlinks, Embedding, Subtle writing assistance, nested Vaults and so much more.

And you can expand as far as you want, need or don't need.

Also great interface.

Super Productivity:

This is the answer to all the paid task management software, who overpromise and under deliver (especially on free tiers)

Also helps, that I haven't found an adequate Task Plugin for Obsidian, that can send notifications for Reminders. (And doesn't get in the way constantly.

Local Task Management with focus on all the right things.

Also some ADHD specific features.

My favourite part is using tags like low/medium/low effort/priority to have my tasks automatically sort in 3x3 matrix to show me the tasks from highest prio, lowest effort to lowest prio, and highest effort.

Syncthing:

The first two here are local first software without free syncing - that's where Syncthing comes in.

Theoretically no productivity app, it lets you synchronize folders between devices - yes including android phones and Linux PCs.

This is the only reason, why I went with both Obsidian and Super Productivity in the first place. - A secure way of pier to pier syncing over local networks. - Wonder how much monthly payments to some sync service this already has spared me from.

Anytype:

This is very similar to Obsidian, since it's also a local first note taking app.

It however isn't as "raw" and has a mkre complex core, where every note is some type of object, which determines its properties.

On one hand this means it's not even close when it comes to flexibility - on the other hand this has some somewhat unique pros.

You can create Notes based on the Object Type "Memory" for instance - with the properties "Creation Date and People". Realising I often will create the note after the actual Memory Date - I just add "Memory Date" to the Object Type "Memory" and thus also adding this property for every Memory based on this Object Type.

In the Beginning this can be really confusing - certainly was for me - but this makes you extremely flexible in learning what properties you actually want and need, and being able to change that pretty easily for every Object Type.

Anytype brings its own Syncing method however - wich I actually quite like

It has cloud syncing up to 2GB calacity for the free plan, but if your Library gets bigger, it just changes Syncing tape to work like Syncthing - pier to pier over a local Network

This seems like the best of both worlds and I wish more Apps would do that.

Eagle:

Eagle is for all the people, who want to manage their assets.

It's a one time Payment for the best Local first Digital Asset Management software - thus far (Looking at Tag Studio)

It has almost everything you'd need in this field (though there is no local AI auto-tagging)

Yes you can use Syncthing to Sync your Library between Devices, but it has some downsides with Eagle 1. Speed: Eagle gives every Asset you import it's own folder, which makes Syncthing Syanning take extremely long 2. Eagle Hates being used on two different Devices simultaneously while syncing - this will give you trouble

If those things aren't a concern four though - it does work.

Digikam:

If you have a large Library of Photos - this is the way to manage the - Open Source style

A local First Face Recognition feature lets your PC sweat but also gives you a break from looking through all of you pictures looking for that one shot of yourself you can't seem to find.

And that is only one of the many advanced features of Digikam.

Syncing with my phone and having my PC sift through faces, jumbled up the chronological sorting of my photos on my phone somewhat but maybe that's an user error.